Birth Certificate - Registry of the baptisms at S. Vito al Tagliamento.
Salvador (nicknamed Bellot) Osvaldo Giuseppe, son of Giacomo of the late Angelo e di Dal Mas *** (detto Zemolo) Antonia di Giacomo, residing in S. Vito, married at S.Vito June 10, 1816,
born December 22, 1826 and baptized on the 24th.

giacomo salvador- http://www.flickr.com/photos/39177534@N06/5540017467/Giacomo Pietro Salvador (known as Bellot) son of Angelo (bein angelo son of the deceased Leonardo) and of Domenica Iacomei (?) daughter of Pietro, was baptized 20 Sept 1794, he was born the night before.

letter- http://www.flickr.com/photos/39177534@N06/5540017625/In few words they say the requests that they received from you imply a deep Genealogical Research. They mention some laws of the Church and they say that they are not supposed and they are not able to perform such a research.
They are in any case available to help a professional researcher that goes there...